methylene group
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英 
例句
One of the hydrogen atoms of the active methylene group is replaced with a cyclooxy group .
活性亞甲基上的一個氫原子是被環(huán)氧基所取代的。
Reactions of Ferrocenecarboxaldehyde with Compounds Containing Active Methylene Group in Aqueous Solution
二茂鐵甲醛與含活性亞甲基化合物的水相反應(yīng)研究